TY - JOUR

T1 - Atom Probe Tomography of the Oxide Layer of an Austenitic Stainless CrMnN-Steel

AU - Monschein, Stefan

AU - Schnitzer, Ronald

AU - Fluch, Rainer

AU - Turk, Christoph

AU - Hofer, Christina

N1 - Publisher Copyright: © 2021 Walter de Gruyter GmbH, Berlin/Boston, Germany.

PY - 2021/5/14

Y1 - 2021/5/14

N2 - This work aimed at developing a methodology for examining the naturally grown passive layer of a thickness of just a few nanometers of an austenitic CrMnN steel by means of atom probe tomography and gaining knowledge on the structure of this alloy's passive layer. The sample surface was ground, polished, cleaned, degreased, electrolytically polished, and oxidized in air to produce a reproducible passive layer. The oxide layer was subsequently coated with a silver layer of a thickness of 3 μm. The silver layer protects the oxide layer during the preparation of the atom probe tips in the focused ion beam microscope and the alignment of the tip in the atom probe. The samples were measured in the atom probe's pulsed-voltage mode. The findings show that an enrichment of oxygen, molybdenum, nitrogen, and chromium and a depletion of manganese, nickel, and iron occur in the area of the passive layer.

AB - This work aimed at developing a methodology for examining the naturally grown passive layer of a thickness of just a few nanometers of an austenitic CrMnN steel by means of atom probe tomography and gaining knowledge on the structure of this alloy's passive layer. The sample surface was ground, polished, cleaned, degreased, electrolytically polished, and oxidized in air to produce a reproducible passive layer. The oxide layer was subsequently coated with a silver layer of a thickness of 3 μm. The silver layer protects the oxide layer during the preparation of the atom probe tips in the focused ion beam microscope and the alignment of the tip in the atom probe. The samples were measured in the atom probe's pulsed-voltage mode. The findings show that an enrichment of oxygen, molybdenum, nitrogen, and chromium and a depletion of manganese, nickel, and iron occur in the area of the passive layer.

UR - http://www.scopus.com/inward/record.url?scp=85106217213&partnerID=8YFLogxK

U2 - 10.1515/pm-2021-0019

DO - 10.1515/pm-2021-0019

M3 - Article

VL - 58.2021

SP - 264

EP - 281

JO - Practical metallography = Praktische Metallographie

JF - Practical metallography = Praktische Metallographie

SN - 0032-678X

IS - 5

ER -